CN111413628A - Charging and battery replacing station with battery evaluation function and evaluation method - Google Patents
Charging and battery replacing station with battery evaluation function and evaluation method Download PDFInfo
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Abstract
The invention discloses a charging and replacing power station with a battery evaluation function and an evaluation method, wherein the charging and replacing power station comprises a battery charging and storing platform, a replacing power platform and a charging and replacing power station control center; the invention has the advantages that: the method comprises the steps of periodically carrying out corresponding test items on each battery pack in the station, combining historical charging data, and utilizing a professional data analysis tool and a battery performance evaluation algorithm to realize rapid, accurate, multidimensional and staged evaluation of the battery pack performance so as to complete the work of battery control strategy optimization and abnormal battery identification.
Description
Technical Field
The invention relates to an electric automobile charging and battery replacing station, in particular to a charging and battery replacing station with a battery evaluation function and an evaluation method, and belongs to the field of electric automobile charging and battery replacing stations.
Background
At the initial development stage of the new energy automobile industry in China, enterprises such as national power grids and the like begin to explore and develop a battery replacement mode, and the method is mainly applied to the field of public transportation. With the development of the industry, the progress of the battery replacement technology and the coming of national support policies, more and more enterprises begin to increase the research and popularization of the battery replacement mode. By the end of 7 months in 2019, nearly 6 thousands of battery replacing vehicles are owned by China, wherein about 4 thousands of battery replacing vehicles are used in public fields such as time-sharing leasing and taxis, about 2 thousands of battery replacing vehicles are used in private fields, and the operation efficiency of the vehicles is improved by popularization of the battery replacing vehicles, so that the vehicle is approved by some consumers.
Compared with a charging mode, the new energy automobile battery replacement mode mainly has the following advantages:
for consumers, the battery replacement mode can realize vehicle-electricity separation, and the acquisition cost of the consumers is reduced. Meanwhile, energy can be quickly supplemented, the problems of mileage anxiety, charging waiting, performance attenuation anxiety and the like are solved, and the driving experience satisfaction degree of the electric automobile is improved.
For vehicle manufacturers and operators, the battery replacement mode can realize centralized management and maintenance of the battery, and the battery is charged under a controllable condition, so that the charging safety of the battery is guaranteed, and the service life of the battery is prolonged.
For energy utilization and recovery, the power conversion mode can adjust the peak-valley load of the power grid, promote the consumption of renewable energy and reduce the impact on the power grid. Meanwhile, centralized control is realized, so that waste power batteries are effectively prevented from flowing into non-compliant channels, and pollution to the ecological environment is avoided.
With the increasing acceptance and attention of the power exchange mode in the industry, some problems to be solved in terms of battery management and maintenance are exposed. The main points are as follows:
after the battery pack is used for a period of time, various performances are attenuated to a certain degree, including: the available energy is reduced, the internal resistance is increased, the consistency is poor, the temperature rise is increased, the safety is reduced, and the like. At the present stage, the battery replacement station only has the functions of battery pack charging, fault monitoring, fire safety alarm and the like, and more is a remedial measure after the safety problem of the battery occurs. The functions of regular performance evaluation, troubleshooting, battery safety early warning and the like of the battery pack in the power conversion station cannot be realized.
The initial control strategy in the battery pack BMS is set according to the state of a fresh battery, and as the available energy of the battery is attenuated, the consistency of the battery is deteriorated, and the SOC error is increased, the early-stage solidified control strategy may not be the optimal strategy for the current-stage battery pack. Although BMS manufacturers will implant a set of SOC and control strategy correction methods at the initial design stage based on cell cycle data in the laboratory. However, the actual application working condition of the battery pack and the battery core circulation test still have certain difference in attenuation effect and cannot be replaced with each other, so that the modification of the BMS control strategy at the present stage is not accurate.
Disclosure of Invention
In order to solve the problems, the invention designs a charging and replacing power station with a battery evaluation function and an evaluation method, which realize quick, accurate, multidimensional and hierarchical evaluation of the performance of a battery pack by periodically carrying out corresponding test items on each battery pack in the power station, combining historical charging data and utilizing a professional data analysis tool and a battery performance evaluation algorithm, thereby completing the work of optimizing a battery control strategy and identifying abnormal batteries.
The technical scheme of the invention is as follows:
a charging and replacing power station with a battery evaluation function comprises a battery charging and storing platform, a replacing platform and a charging and replacing power station control center;
the battery charging and storing platform mainly completes charging and detecting work of a battery pack and comprises a battery charging bin and a battery evaluation bin;
the battery replacement platform mainly completes the work of parking a vehicle, transporting a battery and replacing the battery and comprises a parking platform, a lifting translation unit, a battery transportation unit and the like;
the charging and replacing station control center mainly completes data acquisition, data analysis and control work of vehicle battery replacement, battery charging and battery detection, and comprises a data monitoring platform and a data analysis platform.
Besides the normal vehicle battery replacement process, the following relations exist among the functional modules in the aspect of battery evaluation: in daily work of the charging and replacing station, all battery related data are uploaded to a control center, the control center utilizes historical data of battery pack charging, charging and operation in the charging and replacing station to determine the serial number of a battery pack to be detected according to certain algorithm logic, a battery transportation unit is controlled to move the battery pack to be detected from a battery charging bin to a battery evaluation bin, after a series of professional equipment detection, detection data are uploaded to the control center, a battery evaluation report is generated through a professional algorithm, and corresponding control instructions are sent to the battery evaluation bin and the battery transportation unit according to the report content.
If the battery pack is not abnormal, the battery transportation unit transports the battery pack back to the battery charging bin to be used as a qualified battery pack to participate in vehicle battery replacement operation, optimizes a control strategy, and reserves an evaluation report to be checked;
if the battery pack is abnormal, the battery transportation unit transports the battery pack back to the battery charging bin to be used as the abnormal battery pack and cannot participate in the vehicle battery replacement operation. Meanwhile, the evaluation report is sent to an after-sales maintenance department to inform the after-sales maintenance department of the after-sales maintenance, and the battery pack is maintained as soon as possible. And the repaired battery pack is detected again, and can participate in the battery replacement operation of the vehicle after being qualified.
One or more charging bin positions with a battery evaluation function are arranged in the charging and replacing power station, the ambient temperature in the charging bin positions is controllable, and high-power and high-precision charging and discharging equipment and a special detection instrument are arranged in the charging and replacing power station; besides being normally used as a common charging bin, the system also undertakes the work of regularly detecting each battery pack in the charging and replacing station in real time, and further achieves the expected aims of accurately knowing the performance of the battery pack, correcting the SOC state of the battery pack, optimizing the charging control strategy, prolonging the service life of the battery pack and the like.
The charging bin has the following battery testing functions: the method comprises the following steps of multi-system charging, multi-system discharging, battery capacity testing, battery consistency detection, battery service life prediction, battery fault early warning, insulation internal resistance detection, direct current internal resistance detection, alternating current internal resistance detection, airtightness detection, electric device function detection, BMS protection function detection, battery pack comprehensive evaluation function, data acquisition and transmission function and the like.
Each detection function can be integrated into high-power charging and discharging equipment, and each detection item is completed in a parallel or serial mode.
The control center evaluates the test data according to each battery pack and works out a corresponding processing scheme through an evaluation algorithm, such as: and informing the after-sales personnel to maintain and replace the abnormal battery pack, automatically or offline adjusting the SOC algorithm and the charging strategy in the BMS, and the like.
The battery performance evaluation algorithm mainly comprises evaluation algorithms of battery capacity, consistency, service life and the like and analysis algorithms of all detection results.
A battery evaluation method for the charging and replacing power station with the battery evaluation function comprises the following steps:
(1) according to the service time, the charging quantity or other conditions of each battery pack in the charging and replacing station, including the service life of the battery pack, the accumulated charging quantity, the accumulated driving mileage and the key parameters of the battery pack, such as pressure difference and temperature difference, the service time, the charging quantity or other conditions are used as the judgment standards for performance evaluation of the battery;
(2) the method comprises the following steps that a battery pack to be evaluated, which needs performance evaluation, in a charging and replacing station is conveyed to a charging bin with a battery evaluation function, charging and discharging equipment is connected with the battery pack through a charging and discharging connector, a series of electrical performance detection is completed, and individual detection items can also be connected manually; according to the battery evaluation scheme and requirements, carrying out various test works step by step or independently;
(3) uploading all data and evaluation results generated in the battery test process to a charging and replacing station control center;
the charging and replacing station control center mainly comprises a data monitoring platform and a data analysis platform; the data monitoring platform mainly completes the collection work of data such as vehicle battery replacement, battery charging, battery operation and the like, and judges whether the battery pack needs to be detected or not; and the data analysis platform evaluates the performance of the battery pack through algorithm analysis by using the battery data and the battery detection data collected by the data monitoring platform, generates a comprehensive evaluation report, and performs the next control according to the result.
And the data monitoring platform and the data analysis platform are both built in a monitoring center, and are used for carrying out unified management and control on each charging and replacing power station. The charging and battery-replacing station end comprises a computer, a data acquisition module and a data transmission module, and is used for subsequent work such as consulting, evaluating, counting, calling and the like;
(4) and (4) making subsequent processing schemes such as maintenance, replacement and scrapping and making an individualized charging control strategy for each battery pack in the charging and replacing station according to the performance evaluation result.
The invention has the beneficial effects that:
(1) the charging and replacing station is provided with a charging bin with a battery evaluation function, so that each battery pack in the station can be detected at any time, and the performance state of the battery pack can be known timely and accurately. An individualized charging strategy is formulated according to the evaluation result of each battery pack, so that the battery packs in different states can execute an optimal charging scheme, and the service life of the battery packs is prolonged;
(2) accurately correcting SOC errors and optimizing a BMS control strategy according to the evaluation result of each battery pack;
(3) and according to the evaluation result of each battery pack, accurately identifying the abnormal battery pack, finding out the fault in time and performing after-sale maintenance. The further serious fault of the battery pack is avoided, and the potential safety hazard of the battery pack is reduced to a certain extent;
(4) through gathering the multiple evaluation results and a professional algorithm, the service life trend prediction and the fault safety early warning of the battery pack can be realized.
The invention is further illustrated by the following figures and examples.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
As shown in fig. 1, a charging and replacing power station with a battery evaluation function includes a battery charging and storing platform, a replacing platform, and a charging and replacing power station control center.
The battery charging and storing platform mainly completes charging and detecting work of a battery pack and comprises a battery charging bin and a battery evaluation bin.
The battery replacement platform mainly completes the work of parking a vehicle, transporting a battery and replacing the battery and comprises a parking platform, a lifting translation unit, a battery transportation unit and the like.
The charging and replacing station control center mainly completes data acquisition, data analysis and control work of vehicle battery replacement, battery charging and battery detection. The system comprises a data monitoring platform and a data analysis platform.
Besides the normal vehicle battery replacement process, the following relations exist among the functional modules in the aspect of battery evaluation: in daily work of the charging and replacing station, all battery related data are uploaded (transmitted) to a control center, the control center utilizes historical data of battery pack charging, charging and operation in the charging and replacing station to determine the battery pack number needing to be detected according to certain algorithm logic, a battery transport unit is controlled to move a battery pack to be detected from a battery charging bin to a battery evaluation bin, after detection of a series of professional equipment, detection data are uploaded to the control center, a battery evaluation report is generated through a professional algorithm, and corresponding control instructions are sent (transmitted) to the battery evaluation bin and the battery transport unit according to the report content.
1. And if the battery pack is not abnormal, the battery transportation unit transports the battery pack back to the battery charging bin to be used as a qualified battery pack to participate in the vehicle battery replacement operation, the control strategy is optimized, and the evaluation report is reserved to be checked.
2. If the battery pack is abnormal, the battery transportation unit transports the battery pack back to the battery charging bin to be used as the abnormal battery pack and cannot participate in the vehicle battery replacement operation. Meanwhile, the evaluation report is sent to an after-sales maintenance department to inform the after-sales maintenance department of the after-sales maintenance, and the battery pack is maintained as soon as possible. And the repaired battery pack is detected again, and can participate in the battery replacement operation of the vehicle after being qualified.
One or more charging bin positions with a battery evaluation function are arranged in the charging and replacing power station, the ambient temperature in the charging bin positions is controllable, and high-power and high-precision charging and discharging equipment and a special detection instrument are arranged in the charging and replacing power station; besides being normally used as a common charging bin, the system also undertakes the work of regularly detecting each battery pack in the charging and replacing station in real time, and further achieves the expected aims of accurately knowing the performance of the battery pack, correcting the SOC state of the battery pack, optimizing the charging control strategy, prolonging the service life of the battery pack and the like.
The charging bay has, but is not limited to, the following battery test functions: the method comprises the following steps of multi-system charging, multi-system discharging, battery capacity testing, battery consistency detection, battery service life prediction, battery fault early warning, insulation internal resistance detection, direct current internal resistance detection, alternating current internal resistance detection, airtightness detection, electric device function detection, BMS protection function detection, battery pack comprehensive evaluation function, data acquisition and transmission function and the like.
Each detection function can be integrated into high-power charging and discharging equipment, and each detection item is completed in a parallel or serial mode.
The control center evaluates the test data according to each battery pack and works out a corresponding processing scheme through an evaluation algorithm, such as: and informing the after-sales personnel to maintain and replace the abnormal battery pack, automatically or offline adjusting the SOC algorithm and the charging strategy in the BMS, and the like.
The battery performance evaluation algorithm mainly comprises evaluation algorithms of battery capacity, consistency, service life and the like and analysis algorithms of all detection results.
A battery evaluation method for the charging and replacing power station with the battery evaluation function comprises the following steps:
(1) according to the service time, the charging quantity or other conditions (the service life of the battery pack, the accumulated charging quantity, the accumulated driving mileage and key parameters of the battery pack such as pressure difference and temperature difference) of each battery pack in the charging and replacing station, the service time, the charging quantity or other conditions are used as the judgment standard for evaluating the performance of the battery;
(2) the method comprises the following steps of conveying a battery pack to be evaluated, which needs performance evaluation, in a charging and replacing station to an evaluation bin (a charging bin with a battery evaluation function), and automatically connecting the battery pack to be evaluated to evaluation test equipment (the charging and discharging equipment is connected with the battery pack through a charging and discharging connector to complete a series of electrical performance tests, and individual test items can also be manually connected); according to the battery evaluation scheme and requirements, carrying out various test works step by step or independently;
(3) uploading all data and evaluation results generated in the battery test process to a charging and replacing station control center;
the charging and replacing station control center mainly comprises a data monitoring platform and a data analysis platform; the data monitoring platform mainly completes the collection work of data such as vehicle battery replacement, battery charging, battery operation and the like, and judges whether the battery pack needs to be detected or not; and the data analysis platform evaluates the performance of the battery pack through algorithm analysis by using the battery data and the battery detection data collected by the data monitoring platform, generates a comprehensive evaluation report, and performs the next control according to the result.
And the data monitoring platform and the data analysis platform are both built in a monitoring center, and are used for carrying out unified management and control on each charging and replacing power station. The charging and battery-replacing station only comprises a computer, a data acquisition module and a data transmission module and is used for subsequent work such as consulting, evaluating, counting, calling and the like;
(4) and (4) making subsequent processing schemes such as maintenance, replacement and scrapping and making an individualized charging control strategy for each battery pack in the charging and replacing station according to the performance evaluation result.
Test examples
As shown in fig. 1, a battery evaluation method for the charging and replacing power station with the battery evaluation function includes the following steps:
(1) recording charging process data of all battery packs in the battery bin, and transmitting the charging process data to the data monitoring platform;
(2) the data monitoring platform analyzes the charging data of the battery pack, judges whether the battery pack needs to be evaluated according to algorithm logic, and if the battery pack needs to be evaluated, the monitoring platform sends a calling instruction to the battery bin, and the stacker crane automatically sends the battery pack to be evaluated to an evaluation bin to prepare for implementing various evaluation detections;
(3) the battery pack is connected with a test device (a high-power charging and discharging device with integrated detection functions) in the evaluation cabin, carries out various evaluation works according to requirements, and sends detection results and data to the data analysis platform;
(4) the data analysis platform generates a comprehensive evaluation report through algorithm analysis; and informing the after-sales maintenance personnel to carry out the work of maintaining, adjusting the control strategy or upgrading the battery management system and the like according to the evaluation result.
1. Summarizing battery parameters: and determining parameters and a control strategy of a battery pack in the charging and replacing station, and formulating a battery detection evaluation detection triggering condition.
2. And (3) battery evaluation and detection: according to the control conditions, the battery pack in the charging and replacing station carries out battery evaluation detection at the frequency of once every 2 months or once every 2 kilometres. And the charging and replacing station takes the serial number of the battery pack as a unit, records the daily operation conditions of all the battery packs, and transmits the data to the data monitoring platform in real time for analysis and statistics. When the system detects that a certain battery pack reaches 2 months or 2 kilometers, a command is sent to a charging station control system, the specified battery pack is sent to a charging bin with a battery evaluation function, and battery evaluation detection is carried out as required.
3. Data analysis and processing scheme: the detection data of the battery pack is transmitted to an evaluation data analysis platform, and a comprehensive evaluation report of the battery pack is formed through special algorithm analysis, wherein the evaluation report comprises but is not limited to: battery pack performance, safety, life, etc. A series of processing measures are implemented on the battery pack according to the evaluation report content.
Claims (6)
1. A battery charging and replacing station with a battery evaluation function is characterized in that: the charging and replacing power station comprises a battery charging and storing platform, a power replacing platform and a charging and replacing power station control center;
the battery charging and storing platform mainly completes charging and detecting work of a battery pack and comprises a battery charging bin and a battery evaluation bin;
the battery replacement platform mainly completes the work of parking a vehicle, transporting a battery and replacing the battery and comprises a parking platform, a lifting translation unit and a battery transportation unit;
the charging and replacing station control center mainly completes data acquisition, data analysis and control work of vehicle battery replacement, battery charging and battery detection, and comprises a data monitoring platform and a data analysis platform.
2. A charging and replacing power station with a battery evaluation function according to claim 1, wherein: one or more charging bin positions with a battery evaluation function are arranged in the charging and replacing power station, the ambient temperature in the charging bin positions is controllable, and high-power and high-precision charging and discharging equipment and a special detection instrument are arranged in the charging and replacing power station; besides being normally used as a common charging bin, the system also undertakes the work of regularly detecting each battery pack in the charging and replacing station in real time, and further achieves the aims of accurately knowing the performance of the battery pack, correcting the SOC state of the battery pack, optimizing the charging control strategy and prolonging the service life expectancy of the battery pack.
3. A charging and replacing power station with a battery evaluation function according to claim 1, wherein: the charging and replacing station is provided with a control center, and the control center evaluates the test data according to each battery pack and works out a corresponding processing scheme through an evaluation algorithm.
4. A battery evaluation method for a charging and replacing station with a battery evaluation function according to claims 1-3, characterized by comprising the steps of:
(1) according to the service time, the charging quantity or other conditions of each battery pack in the charging and replacing station, including the service life of the battery pack, the accumulated charging quantity, the accumulated driving mileage and the key parameters of the battery pack, the service time, the charging quantity or other conditions are used as the judgment standard for performance evaluation of the battery;
(2) the method comprises the following steps that a battery pack to be evaluated, which needs performance evaluation, in a charging and replacing station is conveyed to a charging bin with a battery evaluation function, charging and discharging equipment is connected with the battery pack through a charging and discharging connector, a series of electrical performance detection is completed, and individual detection items can also be connected manually; according to the battery evaluation scheme and requirements, carrying out various test works step by step or independently;
(3) uploading all data and evaluation results generated in the battery test process to a charging and replacing station control center;
(4) and (4) making subsequent processing schemes such as maintenance, replacement and scrapping and making an individualized charging control strategy for each battery pack in the charging and replacing station according to the performance evaluation result.
5. The evaluation method according to claim 4, wherein: the charging and replacing station control center mainly comprises a data monitoring platform and a data analysis platform; the data monitoring platform mainly completes the collection work of vehicle battery replacement, battery charging and battery operation data and judges whether the battery pack needs to be detected or not; and the data analysis platform evaluates the performance of the battery pack through algorithm analysis by using the battery data and the battery detection data collected by the data monitoring platform, generates a comprehensive evaluation report, and performs the next control according to the result.
6. The evaluation method according to claim 5, wherein: the data monitoring platform and the data analysis platform are both built in a monitoring center and are used for uniformly controlling all the charging and exchanging stations, and each charging and exchanging station comprises a computer, a data acquisition module and a data transmission module and is used for looking up, evaluating, counting and calling subsequent work.
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